v3.26.1
Document And Entity Information
 6 Months Ended
Jun. 30, 2026
shares
Document Information [Line Items]  
Document Type 10-Q
Document Quarterly Report true
Document Period End Date Jun. 30, 2026
Document Transition Report false
Entity File Number 0-12346
Entity Registrant Name IRONSTONE PROPERTIES, INC.
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 95-2829956
Entity Address, Address Line One 40 Mesa Street, Suite 105
Entity Address, City or Town San Francisco
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94129
City Area Code 415
Local Phone Number 340-4766
Title of 12(g) Security Common Stock, $0.01 par value
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Non-accelerated Filer
Entity Small Business true
Entity Emerging Growth Company false
Entity Shell Company false
Entity Common Stock, Shares Outstanding (in shares) 3,472,491
Entity Central Index Key 0000723269
Current Fiscal Year End Date --12-31
Document Fiscal Year Focus 2026
Document Fiscal Period Focus Q2
Amendment Flag false